Gearing.



No. 630,709. Paiented Aug. 8, I899.

H. W. JAMIESON.

GEARING.

(Application filed Jan. 5, 1898.)

No Model.)

Witnesses. Inventor.

cAMJflZLM 2 I @9- 'At torneyj T5: Mann's FD!!! 00 womnmoq WASHINGTON. u.c

UNITED STATES PATENT OFFICE.

ROBERT W. JAMIESON, OF ROCHESTER, NEW YORK, ASSIGNOR TO THE JAMIESONMANUFACTURING COMPANY, OF SAME PLACE.

GEARING.

SPECIFICATION forming part of Letters Patent No. 630,709, dated August;8, 1899.

Application filed January 5, 1898.

To all whom; it may concern:

Be it known that 1, ROBERT W. J AMIESON, of Rochester, in the county ofMonroe and State of New York, have invented certain new and usefulImprovements in Gearing; and I do hereby declare the following to be afull, clear, and exact description of the same, reference being had tothe accompanyingdrawings, forming a part of this specification, and tothe reference-numerals marked thereon.

My present invention has for its object to provide improved gearing forshafts or wheels arranged at an angle to each other which will enablethe parts to operate easily and smoothly in both directions with minimumfriction and will permit either of the wheels to operate as the driverwithout lost motion, said gearing being thereby particularly adapted foruse as the driving mechanism for cycles; and to these ends it consistsin certain improvements hereinafter described, the novel features beingpointed outin the claims at the end of this specification.

In the drawings, Figure 1 is a plan view of a gearing embodying myimprovements; Fig. 2, a view of the same, taken at. right angles to theplane of Fig. 1 with the teeth in section on the line 2-2; Fig. 3, asectional view on the line 3 3 of Fig. 1.

Similar reference-numerals indicate similar parts.

The gearing containing my invention embodies two wheels or disks 1 and2, adapted to rotate on axes arranged at an angle to each other,(preferably at a right angle,) said wheels in the present embodiment ofthe in-- vention being secured to shafts 3 and 4, which may form thecrank-shaft and lon gitudinallyextending shaft of a so-called chainlessbicycle. The wheel 1 has cut or otherwise formed on its peripherygear-teeth 5, the engaging surfaces 6 of which are formed onepicycloidal or involute curves'that is to say, on curves described byteeth or surfaces on a Wheel rotating synchronously with the wheel onwhich said teeth or surfaces are located. The wheel 2 is in the presentembodiment in the form of a disk on shaft 4:, and the engaging surfacesthereon are rollers 7, conoidal in Serial No. 665,673. (No modelfishapethat is, tapering on a gradual curve at their outer end towardtheir axes, which latter consist of pins 8, fastened to the disk. Thesurfaces of the rollers are also on epicycloidal or involute curves,said rollers being solids of revolution, and they turn on the pins andin a plane at an angle, preferably approximately a right angle, to theplane of rotation of the wheel or disk; but this angle could be variedslightly without impairing the results to any considerable degree. Itwill also be noted that the rollers rotate on axes parallel with theaxis of the disk or wheelon which they are mounted and that their axesare approximately parallel with the plane of rotation of the teeth onthe opposite gear.

If desired, suitable antifriction-bearings, such as rows of balls, maybe arranged between the pins and rollers, this construction being shownin one of my pending applications.

Instead of supporting the pins 8 at one end onlyI connect their outerends rigidly to arms 9 ona plate 10, which latter may or may not beconnected to the shaftat and in the present embodiment is shown asunconnected. This plate 10 serves to connect'all the pins, so that anyforce applied to one pin through its roller will be transferred to andresisted by all of the other pins, and thus the breaking or bendin g ofthe pins by excessive or unusual strains will be prevented withoutmaterially increasing the weight of the parts.

The conoidal form of the rollers, in connection with the teeth havingtheir surfaces on epicycloidal or involute curves, causes the motion ofone wheel to be transmitted evenly and without undue friction to theother and to operate with a receding instead of an approaching action,said rollers and teeth rocking on each other as they approach the centerline, and the rollers turning freely and'rolling on the face of theteeth as they move toward and from the center line'ofthe toothed wheel1.

The gearing described is simple and comparatively cheap in constructionand is well adapted for use on bicycles, as the receding action is thesame when operated with either wheel as the driverand the velocity ratioconstant or uniform.

I claim as my invention 1. In angle-gearing, the combination of twowheels with their axes arranged at an angle, the engaging surfaces onone wheel consisting of a series of. rollers rotatable on axesapproximately parallel with the axis of the wheel, and the teeth on theother wheel and with which the rollers engage extending in the plane ofrotation and having both their engaging faces formed on curvessubstantially as described, whereby either of the wheels may serve asthe driver.

2. Gearing, embodying two wheels with their axes arranged at an angle,the engaging surfaces on one wheel consisting of a series of conoidalrollers rotatable on axes approximately parallel with the axis of thewheel and the teeth on the other wheel and with which the rollers engageextending in the plane of rotation and having both their engagingsurfaces formed on curves substantially as described, whereby either ofthe wheels may serve as the driver.

3. In an angle-gearing, two gear-wheels with their axes arranged at anangle, the engaging surfaces of one wheel consisting of a series ofrollers rotatable 011 their axes, and the teeth on the other wheel withwhich the rollers engage extending in the plane of rotation and havingboth their engaging faces formed on curves substantially as described,whereby either of the wheels may serve as the driver.

at. In an angle-gearing, two gear-wheels with their axes arranged at anangle, the engaging surface of one wheel consisting of a series ofrollers rotatable on their axes, and having their engaging surfacescurved, substantially as described, and the teeth of the other wheelextending in the plane of its rotation and engaging with theroller-teeth to produce a uniform rolling motion.

v 5. In an anglegearing, two gear wheels with their axes arranged at anangle, the engaging surfaces of one wheel consisting of a series ofrotary roller-teeth, which are solids of revolution, and the engagingsurfaces of the other wheel consisting of stationary teeth extendinginthe plane of its rotation, producing a uniform motion.

6. The combination with the disk or wheel, having the pins thereonextending in planes approximately parallel with the plane of the axis,and the rollers turning on the pins, of the ring connected to andentirely supported upon the outer ends of the pins.

7. The combination with the disk or wheel, having the pins thereon, andthe rollers turning freely on said pins, of the ring having the radialfingers thereon connected to and entirely supported upon the outer endsof the pins.

8. In an angle-gearing, the combination of two wheels with their axesarranged at an angle, the engaging surfaces of one wheel consisting ofteeth extending in the plane of r0- tation and formed on curvessubstantially as described and the engaging surfaces on the other wheelconsisting of rollers rotating on axes parallel with the axis ofrotation of said wheel.

9. In an angle-gearing, the combination of two wheels with their axesarranged at an an gle, the engaging surfaces on one wheel consisting ofteeth extending in the plane of rotation and having both their engagingfaces formed on curves substantially as described, and the engagingsurfaces on the other wheel consisting of rollers rotating on axesparallel with the plane of rotation of the teeth on the other wheel.

10. In an angle-gearing, the combination of two wheels with their axesarranged at an angle, the engaging surfaces on one wheel consistin g ofrollers rotatable on bearings parallel with the axis of rotation of thesupportingwheel, and the engaging surfaces of the cooperating'wheelconsisting of solid teeth projecting in their plane of rotation andhaving both the working surfaces formed on the curves described by themovement of the surfaces of the rollers on the other wheel, when saidtwo wheels are rotated on their axes with their engagingsurfaces'operating at the same speed.

ROBERT \V. JAMIESON.

\Vitnesses:

F. F. GHUncn, G. WILLARD RICH.

